LVGroupsWizardStep läuft auf eine Exception

Beschreibung

Deputy::isDeputy(): Argument #2 ($range_id) must be of type string, null given, called in lib/phplib/Seminar_Perm.class.php on line 192 in lib/models/Deputy.php on line 151
#0 lib/phplib/Seminar_Perm.class.php(192): Deputy::isDeputy()
#1 lib/phplib/Seminar_Perm.class.php(124): Seminar_Perm->get_uncached_studip_perm()
#2 lib/phplib/Seminar_Perm.class.php(219): Seminar_Perm->get_studip_perm()
#3 lib/classes/coursewizardsteps/LVGroupsWizardStep.php(509): Seminar_Perm->have_studip_perm()
#4 lib/classes/coursewizardsteps/LVGroupsWizardStep.php(472): LVGroupsWizardStep->is_locked()
#5 app/controllers/course/wizard.php(396): LVGroupsWizardStep->isRequired()
#6 app/controllers/course/wizard.php(125): Course_WizardController->getNextRequiredStep()
#7 vendor/trails/trails.php(558): Course_WizardController->process_action()
#8 app/controllers/studip_controller.php(123): Trails_Controller->perform()
#9 vendor/trails/trails.php(154): StudipController->perform()
#10 vendor/trails/trails.php(121): Trails_Dispatcher->map_uri_to_response()
#11 public/dispatch.php(25): Trails_Dispatcher->dispatch()
#12 {main}